Make gclient cleanup do a 'correcter' thing for git

gclient_scm.py

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Gclient-specific SCM-specific operations."""
 
 import logging
 import os
 import posixpath
 import re
@@ skipping 96 matching lines @@
       raise gclient_utils.Error('Command %s not implemented in %s wrapper' % (
           command, self.scm_name))
 
     return getattr(self, command)(options, args, file_list)
 
 
 class GitWrapper(SCMWrapper, scm.GIT):
   """Wrapper for Git"""
 
   def cleanup(self, options, args, file_list):
-    """Cleanup working copy."""
+    """'Cleanup' the repo.
+
+    There's no real git equivalent for the svn cleanup command, do a no-op.
+    """
     __pychecker__ = 'unusednames=options,args,file_list'
-    self._Run(['prune'], redirect_stdout=False)
-    self._Run(['fsck'], redirect_stdout=False)
-    self._Run(['gc'], redirect_stdout=False)
 
   def diff(self, options, args, file_list):
     __pychecker__ = 'unusednames=options,args,file_list'
     merge_base = self._Run(['merge-base', 'HEAD', 'origin'])
     self._Run(['diff', merge_base], redirect_stdout=False)
 
   def export(self, options, args, file_list):
     """Export a clean directory tree into the given path.
 
     Exports into the specified directory, creating the path if it does
@@ skipping 415 matching lines @@
       print("\n________ couldn't run \'%s\' in \'%s\':\nThe directory "
             "does not exist."
             % (' '.join(command), path))
       # There's no file list to retrieve.
     else:
       self.RunAndGetFileList(options, command, path, file_list)
 
   def FullUrlForRelativeUrl(self, url):
     # Find the forth '/' and strip from there. A bit hackish.
     return '/'.join(self.url.split('/')[:4]) + url